Shaft-coupling.



UNITED STATES PATENTv OFFICE.

ROBERT n. MCLELLAN, on NEW Yoan, N. Y.

SHAFT-'COU PLING..

SPEIFICATION forming part of Letters Patent No. 650,412, dated May 29,1900. 'i' Application filed October 1.3, 1899. .Serialvll'ol 733,488.(No model.)

shaft overlapping and engaging with each other, as herein shown, asleeve surrounding them, and means for locking them and the sleevetogether; and the invention consists of a shaft-couplinghavng thestructure-which-- is herein'described, and precisely defined in theclaims.

` and Fig. 3, a longitudinal section of a crankhanger of a bicycle,showing the interior thereof and the coupling applied to the crankshaft.

- parts in the diierent views.

Athe parts of a shaft to which itis applied.

Similar reference-numerals designate like- The object of this inventionis to 'produce' an uncommonly simple as well as small and effectiveshaft-coupling, so constructed as to be made with but little labor andto render but 1- lWhen the coupling isapplied to the crankvshaft 1 1" ofa bicycle, a..hole is made in the "crank-hanger 4. to aord--access tothe coupling, the hole 4' bein g of such size and so lo'- little effortnecessary to couple or uncouple` The parts 1 and 1 of the shaft overlapand vmake contact with eachother next to their adjacent ends, theirsurfaces of contact being so" inclined to their common axis 4that theparts cannot be separated by moving either lengthwise without disturbingits alinement with the other. The preferred shape of theiroverlappingsections is that shown in the drawings. The part 1 is cut intwo planes which intersect its surface onthe'lin'es 10 and 11,respectively, and the part 1' is cut in two planes which intersect itssurface on the lines 10 and 11', respectively, and the parts are s'oarranged that the surfaces lying in the planes 10 meet, the end 12'andshoulder 13 facing,

respectively, the shoulder 13' and the end 12'..

The sleeve surrounding the overlapping sections maybe the short sleeveshown in Fig.

' tween the end l2' of the partwl andthe shoulder 13 of the part 1. Theend and shoulder between which the screw extends are beveled or grooveda little to provide good bearingsurfaces for the screw. When the screwis driven tightly between the parts 1 and 1', it

moves oneor both of them slightly and forces with a hammer. In thelonger sleeve 2' there vare two screws 3, each of which extends betweenthe parts 1 and 1 of the shaft, as does the screw in the' sleeve 2, andboth of which coact with the sleeve in locking the parts of the couplingtogether byforcingthe overlapping sections against each other andcausing each section to wedge the other against the .inner surface ofthe sleeve. It is intended to apply couplings of the form shown in Fig.1

4mainly to small shafts and those ofthe form shown in Fig. 2 mainly tolarge shafts.

closely surrounding said sections; and a lockingdevicel attached to thesleeve and extendinglbetween the parts of the shaft; ,substantially asdescribed.

p 2.@ Ashaft-coupling comprising the'com'bh IOO nation of: parts of ashaft having overlapping Wedge-like sections making contact with andextending hack of one another; a sleeve closely surrounding saidsections; and a lock-v ing device consisting of a screw extending fromthe exterior to the interior of the sleeve andengaging with the sleeveand exerting pressure on the parts of thefshaft; substan# .tially asdescribed.

nation of: parts 1 and 1 of a shaft having overlapping wedge-likesections making con- 3. A sl1aft-conpling comprising the Acombitact withand extending back of oneanother, the part 1 having the end 12 andshoulder 13, and the part 1 having theend 12 and shoulder 13'; a sleeveclosely surrounding said'sections; and a screwextending from theexterior to the interiorof the sleeve and engaging with thesleeve andextending between one of der13'; a sleeve closely surrounding said sec.

tions; and screws extending from the exterior to the interior of thesleeve-and engaging with thesleeve, and one of said screws extendingbetween the end 12 and shoulder 13 and the other between the end 12 and,shoulder 13; substantially as described.

- ROBERT K. MCLELLAN.

In presence off C. C. MILLER,

WM. J. IIAND'ovER.

